抗JPEG压缩攻击的DWT域图像量化水印算法

JPEG-compression-attack resistant image quantization watermarking algorithm in DWT domain

分析了DWT域系数对JPEG压缩的稳定性,在此基础提出了一种新的抗JPEG压缩攻击的DWT域图像量化水印算法。此算法在提取水印时无需原始图像。实验结果表明,该算法对嵌入的水印具有很好的透明性,对JPEG压缩攻击具有很强的鲁棒性,对其他常见的图像处理攻击,如亮度调整、对比度调整、加噪声、重采样、颜色抖动和平滑等,均具有很强的鲁棒性。

The stability of coefficients in DWT domain against JPECrcompression is analyzed. According to the conclusion,this paper proposes a novel image quantization watermarking algorithm in DWT domain for resisting JPEG-compression attack. The algorithm can extract watermark without using the original image. Experimental results show that the algorithm has fine transparency for the embedded watermark and is strongly robust against JPEG-eompression attack,and the algorithm is also robust against other common image processing attacks, such as brightness adjusting, contrast adjusting, noise adding, resampling, dithering and smoothing.